
<template>
  <div class="app-container">
    讲师添加
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" :min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!--
            数据类型一定要和取出的json中的一致，否则没法回填
            因此，这里value使用动态绑定的值，保证其数据类型是number
          -->
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>
      <!-- 讲师头像：TODO -->
      <el-form-item label="讲师头像">
          <!-- 头衔缩略图 -->
          <pan-thumb :image="teacher.avatar"/>
          <!-- 文件上传按钮 -->
          <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
          </el-button>
          <!--
          v-show：是否显示上传组件
          :key：类似于id，如果一个页面多个图片上传控件，可以做区分
          :url：后台上传的url地址
          @close：关闭上传组件
          @crop-upload-success：上传成功后的回调 -->
          <image-cropper
                        v-show="imagecropperShow"
                        :width="300"
                        :height="300"
                        :key="imagecropperKey"
                        :url="BASE_API+'/eduoss/fileoss/uplad'"
                        field="file"
                        @close="close"
                        @crop-upload-success="cropSuccess"/>
      </el-form-item>
      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
import teacherApi from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'
export default {
    components: { ImageCropper, PanThumb },
    data(){
        return{
            teacher:{
                sort: 0 ,
                level: 1
            },
            saveBtnDisabled:false,
            imagecropperShow:false,
            imagecropperKey:0,
            BASE_API:process.env.BASE_API
        }
    },
    created(){
        this.init()
    },
    watch:{ // 监听器
       $route(to,from){ // 陆游监听
        this.init()
       }
    },
    methods:{
        init(){
          if(this.$route.params &&this.$route.params.id){
            const id = this.$route.params.id
            this.teacherById(id)
          }else{
            this.teacher = {}
         }
        },
        saveOrUpdate(){
          this.saveBtnDisabled =true
          // 添加
          if(!this.teacher.id){
            this.saveTeacher()
          }else{
            this.updateTeacher()
          }
        },
        // 添加讲师
        saveTeacher(){
          teacherApi.addTeacher(this.teacher)
          .then((res)=>{
            this.$message({
              type:'success',
              message:'添加成功'
          })
          // 返回列表 路由切换
          this.$router.push({path:'/teacher/table'})
        })
        },
        // 通过id 进行教师信息回调
        teacherById(id){
          teacherApi.teacherById(id)
          .then(res =>{
            this.teacher = res.data.teacher
          })
        },
        updateTeacher(){
          console.log(this.teacher)
          teacherApi.updateTeacher(this.teacher)
          .then(res=>{
            this.$message({
              type:'success',
              message:'修改成功'
            })
          })
          .then(res =>{
            this.$router.push({path:'/teacher/table'})
          })
        },
        close(){
          this.imagecropperShow = false
          this.imagecropperKey = this.imagecropperKey +1
        },
        cropSuccess(res){
          this.imagecropperShow = false
          this.teacher.avatar = res.url
        }
    }
}
</script>